code: def test_clear_event_setup_correctly(self):
      with gr.Blocks() as demo:
          chatbot = gr.Chatbot([["Hello", "How are you?"]])
          with gr.Row():
              textbox = gr.Textbox(scale=3, interactive=True)
              gr.ClearButton([textbox, chatbot], scale=1)
  
      clear_event_trigger = demo.dependencies.pop()
      assert not clear_event_trigger["backend_fn"]
      assert clear_event_trigger["js"]
      assert clear_event_trigger["outputs"] == [
          textbox._id,
          chatbot._id,
      ]
  
file_path: gradio/test/test_buttons.py
imports: from unittest.mock import patch
  import pytest
  import gradio
label_desc: Use image node_id 1 for calling the TestClearButton obj's underlying member method code with example usage: obj.test_clear_event_setup_correctly() without return types